Pump packing



J. L. SHAFER Feb. 21, 1928.

PUMP PACKING Filed April 16. 1925 lllflllillll INVENTOR J L. Slayer.

ATTORNEYS Patented Feb. 21, 1928.

UNITED srarss JQHN LIONEL sn'nrnn, or 302mm, arrssounr.

Letam ea'rerir orrics.

PUMP PACKING.

Application filed April 16, 1925. Serial No. 23,620.

packings for This invention will be best understood from a consideration of the following detailed description, in view of the accom panying drawing forming a part ofthe specification; nevertheless it is to be understood that the invention is not confined to the disclosure, being susceptible of such changes and modifications which shall define no material departure from the salient features of the invention as expressed in the appendedclaims.

In the drawings: I I

Fig. 1 is a vertical section of a pump showing the packing or stuiling box in position. I r

Figure 2 is a view in perspective of the pump unit shown in Figure 1.

Figure 3 sleeve forming part of the packing for the pump.

Referring more particularly to the drawings conduits 8 and 9 are respectively connected by means of elbows 23 with alined pump cylinders 24 and 25, respectively. The inner ends of the alined cylinders 24 and 25 are respectively screwed into a threaded opening in a housing 26 which is adapted to be bolted as shown at 27 to a closure plate 28. The closure plate is secured to a flanged opening 29 formed at each side of the delivery pump housing 30.-

The plate 28 is provided with a hub 31 having a reduced boss section 32 and a shoulder 33 located between the hub portion 31 and the boss 32 to form a seat for a compression 7 spring 34. The boss 31 is prov ded with a pair of threaded passages 35into which are adapted to be screwed a threaded bolt 36 for adjusting a packing gland 37.

This packing gland as shown in Figure 3 is formed by a plate 38 having pairs of cars 39 extending in opposite directions and adapted to receive the portion '40. of the bolt 36 which is located between a pair of flanges 41 and 42 integrally formed with the bolt 36. Extending inwardly from the plate 38 "is a cylindrical portion 43 which is is a view in perspective of the adapted to embrace a piston 44 and has its outer free end bevelled as shown at 45 to engage a'packing 46 surrounding the piston 44 and located within'an enlarged recess within the hub 31. The outer ends of the c bolts pass through openings protected by packing 47 in the housing 26. The outer projecting ends of the bolts are made rectangular 1n cross section as shown at 48 in order that the same may be conveniently engaged by a suitable tool for rotating said bolts.

As shown in Figure 1 a pair of pistons 44 and .44" are integrally formed with a connecting-rod 49 which isoperable within the main pump chamber 50. The connecting rod is provided with an annular flange 51' which is perforated to receive bolts 52 for locking the two sections 53 and 54 of the main pump piston generally designated by the numeral 55. The piston 55' is adapted to be cushioned by the springs 34 at the opposite limits'of the strokes of thepiston.

In the preferred form the pistons 44 and 44 and the integrally formed connecting rod 49 are provided with a longitudinal passage 56 passing entirely through the pistons and connectlng rod and opening into chambers 57 at the outer ends or" the pistons. These chambers are closed by valve cages 58 which have a central passage to receive a valve stem 59. A spring 60 is located within the chamber 57 and is adapted to act upon a valve 61 carried by the stem 59. These valves close the opposite ends of the port upon the suction stroke of each piston. The project ing stems 59 are adapted to be engagedby a lug 62 mounted in horizontal alinement .with the stems and screwed into threaded forcing the valve 59 open.

The elements are assembledas follows:

With the plungers 44 and 44 in place the 3 cover plate 28 is connected to the pump casing 30 by means of bolts. Packing 46 is disposed in position within the hub 31 and embracing the pistons 44 and-44 when the gland 37 is positioned in place on the respecthe outer end 48 of said bolts until the gland 37is moved into its proper position when the housing 26 is bolted to the cover plate 28. The cylinders 2 st and 25 are then' readily removed or corrected as thecase may be.

The passage 56 in the pistons 44: and 4A is designed to relieve pressure of the excess of liquid in either of the conduits 8 or 9 so that when, for instance, the piston 44 reachesthe limit of its stroke, the lug 62will engage the stem 59 and operate valve 61 thereby opening said conduit to cylinder 25 so that the liquid may pass from said cylinder through theconduit 56 and into the cylinder 2i which has been on its suction stroke. Upon the reverse operation of the pistonsthe lug 62 adjacent piston will operate valve stem 59 and open said valve whereby the pressure in said cylinder will be relieved and a portion of the liquid will be transferred through the conduit 56 to piston 25. i i

What I claim is: i l i 1. Ina fluid pressure pump, a packing colnprisinga plate having an inwardly projectin hollowhoss, the end of the boss being provic ed With an inwardly turned annular flange, packing material located in the hollow boss, a cylindrical gland having the inner end thereof in engagement with the packing material, a cover embracing the gland and provided wlth a flange secured to the plate,

said gland having oppositely disposed pairs of ears, bolts having threaded engagement with the boss and provided with spaced ings adapted to engage opposite sidesot' the ears, with the bolts at these points being received between saidearsf 2. In a fluid pressure pump, a packing 6011113118111? a plate having an inwardly pro jecting ho low boss, the endo'f the bossbeing provided with an inwardly turned annular flange, packing material located in the hollow boss, a cylindrical gland having the inner end thereof in engagement with the packing material, a cover embracing the gland and provided With a flange securedto the plate,

said gland having oppositely/disposed pairs of cars, bolts having threaded engagement,

with the boss and provided with spaced rings adapted to engage opposite sides oi the ears,

with the bolts atthese points being received at the outer limit of the stroke or said piston between said ears, said cover being cupshaped and provided with passages through provided with means adapted to be gripped i with a suitabletool for rotating said bolts.

JOHN LIONEL SHAFER. 

